By Kelly Hockenberry, Columnist, The Times Happy Thanksgiving! What a spectacular weekend of feasting, family, and fun! After a solid week of eating waaaaay too many calories, I have a plan to burn the bird: Christmas Shopping Cardio. No, it’s not a new class at the Y. Yes, I just made it up…but, I think the concept is sure to go viral. Lucky for us, it’s the ( much anticipated) #GirlsDayOut...